Tractor



FIG. 1 is a perspective view of the tractor showing my new design;

FIG. 2 is a side elevation view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof; and

FIG. 5 is a top plan view thereof.

The side opposite to that shown in FIG. 2 is a mirror image thereof, with the exception of the two ladders. 

The ornamental design for a tractor, as shown and described. 